The previous errata patch 019_libssl broke bidirectional SSL_shutdown.
This can cause a hang in some software that calls SSL_shutdown in a loop.
Problem reported and fix tested by Predrag Punosevac.  Thanks to Steffen
Nurpmeso who independently found that this was due to an SSL_shutdown loop.

ok jsing

This is errata/6.7/020_libssl.patch.sig